*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  div{
    button:nth-child(1){
      margin-left: 20px;
    }
    button{
      // width: 110px; 
      height: 40px;
      text-align: center;
      line-height:40px;
      margin-right: 20px;
    }
  }